Spraying-nozzle.



H. L.-PETTIT.

SPRAYING NOZZLE- APPLICATION FILED Mm l4. I918.

Patented Mar. 4,1919.

515115 m. Puma-unto Arman/Er was mam a c HAROLD L. PETTI'I', orwarnarown; NEW YORK, ASSIGNOR or ONE-HALF T0 NELLIE 1 M. rn'rrrr, orwarnn'rown, new YORK.

SPRAYING-NO ZZLE.

To all whom it may concern:

Be it knownthat LHARoLn La Pn'r'rir, a citizen of the United States,residing at WatertoWn, in the county of Jefferson and State of New York,have invented certaln new and useful Improvements in Spraying- .Nozzles,of which the following is a specification.

This invention relates to improvements in spraying nozzles, designed foruse in con nection with paper-making machines, for breaking-up ordissipating the foam which usually gathers on the surface of the liquidpulp as it "flows from the flow-boxes to the Fourdrinier wires. 1 Theobjectof the invention is to provid a novel, simple andeifective-spraying deing drawing, in which-- Figure l is a side view ofpart of the wetend of a paper machine and a partial section of theflow-box; showing my improvement applied thereto.

Fig. 2 is an enlarged side elevation of the spraying nozzle. 7

Fig. 3 is a central longitudinal sectional view of the same.

Fig. 4 is a detail view of the valve and spraying member.

Fig. 5 is afront end view of the device.

, In the drawing, 2 represents generally the wet-end of a paper machine,and 3 the flow-box which contains and delivers the liquid paper-stock orpulp 4 to the machine. The pulp 4 upon leaving the flow-box 3 flows overan apron or dam 5, and falls into a trough 6, which carries the pulponto the Fourdrinier wire 7 The agitation of the pulp flowing over theapron 5 and falling into the trough 6 creates a considerable amount offoam, as 4' (Fig. 1), which, unless broken-up or destroyed interfereswith the proper making of the paper. Hereto- Specification of LettersPatent.

Application filed March 14, 1918.

Patented Mar. 4,1919.

Serial No. 222,364.

fore, various spraying devices have been employed for destroying thefoam, but none of these devices have been entirely satis factory,principally because the sprays have beentoo coarse or lacked properdistribution over the foam area, to effectually break up thefinebubbles-comprising the foam. It 1s .a particular object of the presentinvention to provide a spraying nozzle, which is capable of delivering afine a'ndpowerful spray that destroys the foam before it reaches theFourdrinier ,wire without in- ]uriously dilutingthe pulp. The followingis a detailed description of my improved spraying device: i i i 9representsa casingor body, having an enlarged cylindrical portion 10,which is boredout centrally, as at 11, for forming a relatively largevalve and spraying. cham her, the said bore extending? somewhat reduced, as atl2,to the oppositeend' of the portion 10. 1 13 represents alateral intake nipple for connection withasui tab-le water supply p1pe,as 14, which preferably extends 'acrossthe front end of the flow-box 3,and to which, in practice, four or five of the spraying nozzles areusually applied. Thefn'i ple 13 conducts the water, preferably underconsiderablepressure, into the interior of the casing 9. The casing 9has a reduced threaded extension 15, which is bored out longitudinallyto receive and support a valve-stem 16. 17 represents a circular ordisk-like valve formed or mounted on one end of the stem 16 which isdisposed within the casing 9, the said valve being disposed in the outerend and having a diameter slightly less than the diameter of the bore11, so as to allow the water contained in the chambers 11 and 12 andunder pressure, to escape. around the valve in a funnelshaped spray, asindicated by the broken lines in Figs. 1 and 3. To produce the properspraying effect the valve 17 should be flush with the end of the casing,as shown in Fig. 3. Within the chamber 11 and also formed or mountedupon the valve-stem 16, is a cylindrical spraying member 18, which isnormally spacedfrom the valve 17 and is preferably held firmly against ashoulder 19 arranged at the intersection of the chambers 11 and 12. Thespraying member 18 substantially fits and fills the bore of the chamber11, and its circumferential sur face is provided with a number ofgrooves 20 having a helical pitch, through which the .17 is projected ina fine funnel-shaped spray,

over a relatively broad area, as indicated. The stem 16 passes throughthe reduced end 15 of the casing, also through a glandnut 21 and apacking 22, and extends a considerable distance beyond these parts. Thepacking 22 is employed for preventing leakage of the water through thereduced end 15 of the casing. The outer end of the stem 16 is providedwith a knob or button '23, by which the stem may be manipulated forcleaning the valve and the chamber 11 (see dotted lines in Fig. 3). Inorder to properly hold the valve 17 and spraying member 18 in place, asshown in full lines in Fig. 3, while said parts are subjected to therelatively high water pressure, I provide a spring 24, which surroundsthe stem 16 just beyond the gland-nut 21, one end of the spring engagingthe gland-nut, while the opposite end engages a common nut 25, which isadjustable on the threaded outer end of the stem, as shown.

Having thus described my invention, what I claim as new and desire tosecure by Let ters Patent, is

1. A hollow body having a cylindrical boreno'rmally open to theatmosphere at one end, and having a similar reduced concentric bore anda shoulder at the intersection of said bores, a valve stem passingthrough said body, a disk valve carried by one end of said stem anddisposed within and held flush with the open end of the larger bore,

and a cylindrical enlargement on said stem within said larger bore, saidenlargement being resiliently held against said shoulder for holdingsaid valve flush with the open end of the larger bore.

2. A spraying nozzle including a casing having in one end a normallyopen cylindrical valve chamber separated from a smaller concentricchamber by an annular shoulder, a valve-stem partially disposed in saidcasing, a cylindrical valve mounted on one end of said stem disposedconcentrically within the open end of said chamber, said valve having asmaller diameter than the mouth of said chamber, a spraying mems bercarried by said stem spaced from said valve and having substantially thesame diameter as said chamber, said member engaging the shoulder andhaving circumfercntial grooves for the passage of the water, a springfor holding said member against said shoulder and said valve flush withthe endof said casing and means for increasing and decreasing thetension of said spring.

In testimony whereof I aflix my signature.

HAROLD L. PETTIT.

Copies of this patent may be obtained for live cents each, by addressingthe Commissioner of Yatents,

Washington, D. G.

